/**
 * 判断文件类型的宏
 * S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 */

#include "apue.h"

int main(int argc, char const *argv[])
{
    int i;
    struct stat buf;
    char *ptr;

    for(i = 1; i < argc; i++) {
        printf("%s: ", argv[i]);
        if (lstat(argv[i], &buf) < 0) {
            perror("lstat error");
            continue;
        }
        if (S_ISREG(buf.st_mode))
            ptr = "regular";
        else if (S_ISDIR(buf.st_mode))
            ptr = "directory";
        else if (S_ISCHR(buf.st_mode))
            ptr = "character special";
        else if (S_ISFIFO(buf.st_mode))
            ptr = "fifo";
        else if (S_ISLNK(buf.st_mode))
            ptr = "symbolic link";
        else if (S_ISSOCK(buf.st_mode))
            ptr = "socket";
        else 
            ptr = "unknown mode";
        printf("%s\n", ptr);
    }
    return 0;
}

